Do not expose user container ports if using internal IPs
Do not expose user container ports if using internal IPs

Fokko/dockerspawner,betatim/dockerspawner,jupyter/dockerspawner,quantopian/dockerspawner,jhamrick/dockerspawner,Fokko/dockerspawner,minrk/dockerspawner,betatim/dockerspawner,minrk/dockerspawner,jupyter/dockerspawner,quantopian/dockerspawner,jhamrick/dockerspawner